[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Fri, 03 Jan 2014 12:44:42 -0500
From: Daniel Kahn Gillmor <dkg@...thhorseman.net>
To: oss-security@...ts.openwall.com
CC: gremlin@...mlin.ru
Subject: Re: kwallet crypto misuse
On 01/03/2014 02:27 AM, gremlin@...mlin.ru wrote:
> On 02-Jan-2014 09:15:15 +0100, Florian Weimer wrote:
>
> > I just noticed this is now public:
> > http://gaganpreet.in/blog/2013/07/24/kwallet-security-analysis/
> > Short summary: kwallet uses Blowfish to encrypt its password
> > store, and despite an attempt at implementing CBC mode (in a
> > file called cbc.cc no less), it's actually ECB mode.
>
> That's unpleasant, but not really a fatal issue...
>
> > UTF-16 encoding combined with Blowfish's 64 bit block size means
> > there are just four password characters per block.
>
> But this is: any and all passwords, being used for encryption key
> generation, must be hashed, then salted, then hashed again. SHA-256
> may be a good choice for generating Blowfish 256-bit key this way.
what kind of hashing and salting are you talking about? i don't think
hashing and salting makes sense in the context that you were quoting
above. Are you aware that kwallet stores a database of passwords that
need to be able to be produced back for the user (or the user's
applications) in the clear?
--dkg
Download attachment "signature.asc" of type "application/pgp-signature" (1028 bytes)
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
